Method of making sheaves.



U. H. LANGILL. METHOD OF MAKING SHEAVES.

APPLICATION FILED SEPT. 22,1913.

1,104,200, Patented July 21, 1914.

- -ff r Wbwesses: legit- T a J. M I 9 UNITED 4STATES'15ATENT OFFICE.

CHARLES H. LAN GILL, OF BQSTON, MASSACHUSETTS.

METHOD OF MAKING SHEAVES.

To all whom it may concern:

, Be it known that ,1, CHARLES H. a citizen of the United States of and LANGILL, America,

inafter given. 1

C Of the drawings: Figure 1 reperesents a horizontal section of a mold or flask having positioned therein the tread portion of a the patterns used in casting said Fig. 2 represents a vertical section being on line mg metal to be poured therein. Similar characters designate throughout the several figures ings;

In thedrawings, 10, 11, tively the upper, central, a flask or mold. hese parts are adapted to be positioned relative to one another when in use by means of the locking pins 13 and 14. en it is desired to cast a pulley the like parts and 12 are respecand lower parts of lower flask 12 1s partially filled with sand 15 Fig.,2 of the drawings. This pattern 19 also has an annular rib 2-0 surrounding the edge of the tread portion 17. The upper. part of the flask is then positioned on the part 11 and Specification of Letters Patent.

- After the removal of patterns, this 7 of the draw- Patented July 21, 1914.

Application flledseptember 22, 1918. Serial 1T0. 791,251.

part 11 by means of the pins 13. The entire mold or flask is then inverted and the part 12 with the sand packed therein is part 11 and th the pattern 16 the part 12 with another part of the molded sand therein is replaced and secured to the central in proper. position relative to this 21 by means of the sand within the part 11 of the flask.

ported cavity central tread sheave. into th with a therein and retained in position by means of be formed integral of The advantages of 'a sheave thus constructed to be used for various purposes is obvious. The present method of casting provides a simple means of manufacturing such sheaves in which the body portion may be of brass and the tread portion of hardened metal.

It is believed that the operation and many advantages of this invention will be fully apparent from the foregoing description.

Having thus described my invention, I claim:

thereof, said patterns having annular ribs adapted to fit over the edges of said tread portion and being surrounded by sand, removing said patterns, and pouring metal into as to prevent the cavities formed by the removal of said patterns, thereby embedding the tread portion in the periphery of said pulley.

2. The method of casting sheaves consisting of positioning a pattern in an outer part of a flask by means of sand packed therein, positioning an annular metal tread portion on said pattern and in a central art of the flask by means of sand packed tiierein, p0- sitionin the other pattern in the other outer parts 0 said flask and partly upon said tread portion, packing sand around said last mentioned pattern, removing the upper part of the flask, removing the upper pattern, replacing said upper part of the flask, inverting the entire mold, removing the other pattern in the same manner an replacing the part of the flask from which the other pattern had been removed, andpouring metal into the cavities formed by the removal of said patterns.

3. The method of casting sheaves consisting of positioning an annular metal tread portion in a central part of a flask by means of sand packed therein with patterns positioned on either side thereof by sand in the outer parts of said flask, said patterns being provided with annular ribs fitting over the edges of said tread portion, removing the upper part of the flask, removing the upper pattern, replacing said upper part of the flask,

inverting the entire mold, removing the other pattern in the same manner, and replacing the part of the flask from which it was removed, and pouring metal into the cavities formed by the removal of said patterns. I

Signed by me at 4 Post Office Sq., Boston, Mass, this 18th day of September, 1913.

-. CHARLES H. LANGILIJ,

Witnesses:

WALTER E. LOMBARD, EDWARD F. ALLEN. 

